Metal lath



Feb. 5, 1929.

R. H. SAGENDORPH METAL LATH Filed Nov. 8, 1926 2 Sheets-Sheet I?.v

A jlzvefzZor.' M H. sa

Patented Feb. 5, 1929. l

UNITED STATES i ,1,101,1257 PATENT orifice.

ROBERT`H. SAGENDORPH,j F BBOOKLINE, MASSACHSETTSpASSIGNOR TO EASTERN EXPANDED METAL COMPANY, OF CAMBRIDGE, MASSACHUSETTS, VA CORPORATION OF MASSACHUSETTS.

Application filed November This invention relates to metal lath, an object of the invention being to provide an improved lath formed by first slitting and then expanding a met-al sheet, and thereafter applying a coating material to the face of the slitted and expanded sheetin such manner as to cover predetermined portions of the sheet so as to provide keyways or spaces of, considerable less total area than the area of the sheet for retaining the plaster when applied, thereby enablin a very considerable saving in the amount o? plaster used.

Objects of this invention will appear in the following description and appended claims, reference being had to the accompanying drawings forming a part of this specification wherein like reference characters designate corresponding parts in the several views.

i Fig. l is a plain view showing a portion ofa sheet of metal lath. made in accordance with my invention. i

Fig. 2 is an enlarged section taken substantially on lines 2-2, Fig. l.

Fig. 3 is a section similar to Fig. 2 showing 26 the plaster applied to the lathing to make the finished wall.

Fig. 4 is a plan view illustrating a portion of a sheet of metal lath ,embodying a modied form of the invention.

30 Fig. 5 is an enlarged sect-ion taken on lines 4-4, Fig. 3.

Fig. 6 is a section similar to Fig. 5 showing the plaster applied to the lathin to make a finis ied wall of the form of lat ing shown in Figs. 4 and 5.

Before explaining in detail the resent invention, and the method or mode of) operation embodied therein, it is to be understood that the invention is not limited in its application to the details of construction and arrangement of parts illustrated in the accompanying drawings, since the invention is capable of other embodiments and of being practiced or carried out in various ways. Also it is to be understood that the phraseology or termi' nology employed herein is for the purpose of description and not of limitation, and it is not intended to limit the invention beyond the terms of the several claims hereto ap- .Fso pended or the requirements of the prior art. In accordance with the present preferred forni of my invention tlie metal lath is first slitted and expanded in any suitable machine and in accordance with any preferred system.

Une form of expanded sheet is shown in Fig.

METAL LATI-I.V V

s, 192e. serial No. 146.880.

' l by way of illustration..l A coating of pulp or analogous fibrous material is then applied to the expanded sheet. This material when applied is a Wet pulpy or plastic mass capable of entering the interstices or spaces A between the spaced strands B of the lath. food pulp such as,used for paper stock or other fibrous material may be used, and is. spread over the lath in a layer so as to he preferably of the thickness `of the metal strands as shown in Fig. 2.

teferring to Figs. l and 2, the pulp or fibrous material may be applied by means of y a suitable press or byfeeding the expanded metal sheet between rollers. In this forni ot' the invention,- sections C of the sheet are covered or embedded so as to provide inter\` mediate these sections keyways D of suitable width to enable the plaster to be applied to the lath and Ato cling or to be keyed there- 75 to, as shown in Fig. 3, the layer of laster being designated M and and the keys The embedded sections C of the lath will preferably have a slightly greater thickness than the thickness ofthe portions D so that the layers of fibrous materialv enclosing the strands of the lath will not only adhere to the latter but also form a continuous strip in which the libre or pulp tliroughoutits length will be united together, thereby resist- S5 ing any tendency of the layersof pulp niaterial to become separated from the strands of the lath. In addition it will be noted that the strands B of the lath are positioned edgewise and in an inclined matter transversely to the plane oi' the sheet. Therefore when the strands are embedded in the pulp matey rial, the inclined faces 'of thestrands will Vform a locking means preventing the pulp from being forced out of the spaces A. The inclined position, therefore, of the strands as clearly shown in Fig. 2, enables them to clinch the :pulp material in the spaces between the strands, as ,a result of which the strands of the lath` and the pulp material 10o will be firmly united together in tlieisections or layers C. Moreover', the inclination of the edges of the strands at an angle to the lane of the lathing rovides a body or reen orcenient for the fi rous material, which is parlos ticularly desirable in a construction wherein uncovered areas, such as D, are provided, due to the tendency of such lathiiig to flex sharply and break down the fibrous body,

such as pulp, which, although relatively flexim ible or non-brittle, as compared to a plaster, should be protected in this or similar manner against sharp deflection. rllhe intermediate uncovered portions D of the metal also having the edges of the strands disposed at A an angle to the wall, co-operate effectively with the plaster M and key or clinch the same in position upon the lath, at the saine time lproviding asuitable rigid foundation or reenforcement for the plaster.

Referring to Figs. Ll, 5 and 6, the coacting ot' pulp or vfibrous material may be iirst `spread over the lath in a continuous sheet l spaces E providing keys to retain the plaster in position, while at the same time the total area of these holes will loe-considerably less than the total area of the normal spaces between the strands of the lath, thereby enabling a considerable saving of plaster to.be

had. In Fig. Gthe surface layer of plaster isjshown at O and the keys at l?. J

The pulp or fibrous material whichI may be used inthe presentinvention is relatively"l cheap and may be readily and easily applied 'by suitable mechanism so that the cost of the lath vwill not vbe materially increased. Onthe other hand the resultant lath is stiller and has more strength, is easier to handle, and

will enable a considerably greater' saving in plaster than the additional cost of the lath.

1What l claim is:

l. rl`he improved lathing material-which comprises a sheet of expanded metal certainY areas of which have holes between the strands closed by masses of dry paper stock fibers, the fibers being heldin place by enveloping the strands of metal and the remaining areas of the sheet being uncovered to form openings through it.

2. The improved lathing material which comprises a sheet of expanded metal having strands disposed edgewise and angularly relative to the plane ot' the sheet, certain areas J ofthe sheet having `holes between the strands closed by masses. of dry paper stock fibers, the ibers being held in place by enveloping the strands of metal and the remaining areas of the sheet being uncovered to form open ings through it in which .the metal strands are exposed.

ln testimony whereof lt ax my signature.

sonner rr. saesunonrn. 

